package controller;

import domain.Student;
import service.StundetService;

import java.util.Scanner;

public class StudentController {

    Scanner sc = new Scanner(System.in);
    StundetService stundetService = new StundetService();

    public void start() {
        while(true){
            System.out.println("--------欢迎来到 <学生> 管理系统--------");
            System.out.println("请输入您的选择: 1.添加学生  2.删除学生  3.修改学生  4.查看学生  5.退出");
            String choice = sc.next();
            switch(choice){
                case "1":
                    //System.out.println("添加学生");
                    add();
                    break;
                case "2":
                    //System.out.println("删除学生");
                    delete();
                    break;
                case "3":
                    //System.out.println("修改学生");
                    update();
                    break;
                case "4":
                    //System.out.println("查看学生");
                    findAll();
                    break;
                case "5":
                    System.out.println("退出");
                    return;
                default:
                    System.out.println("您的输入有误，请重新输入");
                    break;
            }
        }
    }

    public void update() {
        String updateId;
        while(true){
            System.out.println("请输入学号");
            updateId= sc.next();
            boolean flag = stundetService.isExists(updateId);
            if(!flag){
                System.out.println("不存在，请重新输入");
            }else{
                break;
            }
        }
        System.out.println("请输入姓名");
        String name = sc.next();
        System.out.println("请输入年龄");
        String age = sc.next();
        System.out.println("请输入生日");
        String birthday = sc.next();
        Student newStu = new Student();
        newStu.setId(updateId);
        newStu.setName(name);
        newStu.setAge(age);
        newStu.setBirthday(birthday);
        stundetService.update(updateId,newStu);
        System.out.println("修改成功");
    }

    public void delete() {
        String delId;
        while(true){
            System.out.println("请输入学号");
            delId= sc.next();
            boolean flag = stundetService.isExists(delId);
            if(!flag){
                System.out.println("不存在，请重新输入");
            }else{
                break;
            }
        }
        stundetService.delete(delId);
        System.out.println("删除成功");
    }

    public void findAll() {
        Student[] stus = stundetService.findAll();
        if(stus==null){
            System.out.println("查无信息，请重新输入");
            return;
        }
        System.out.println("学号\t姓名\t年龄\t生日");
        for (int i = 0; i < stus.length; i++) {
            Student stu = stus[i];
            if(stu!=null){
                System.out.println(stu.getId() + "\t" + stu.getName() + "\t" + stu.getAge() + "\t\t" + stu.getBirthday());
            }
        }
    }

    public void add() {
        String id;
        while(true){
            System.out.println("请输入学号");
            id= sc.next();
            boolean flag = stundetService.isExists(id);
            if(flag){
                System.out.println("学号存在，请重新输入");
            }else{
                break;
            }
        }

        System.out.println("请输入姓名");
        String name = sc.next();
        System.out.println("请输入年龄");
        String age = sc.next();
        System.out.println("请输入生日");
        String birthday = sc.next();
        Student stu = new Student();
        stu.setId(id);
        stu.setName(name);
        stu.setAge(age);
        stu.setBirthday(birthday);
        boolean flag = stundetService.add(stu);
        if(flag){
            System.out.println("添加成功");
        }else{
            System.out.println("添加失败");
        }
    }
}
